Lenovo ThinkServer RD440 User Manual And Hardware Maintenance Manual page 211

CAUTION:
The heat sinks and microprocessors might be very hot. Turn off the server and wait three to five
minutes to let the server cool before removing the server cover.
Before you begin, print all the related instructions or ensure that you can view the PDF version on another
computer for reference.
Note: Depending on the model, your server might look slightly different from the illustrations in this topic.
To replace the system board, do the following:
1. Remove all media from the drives and turn off all attached devices and the server. Then, disconnect all
power cords from electrical outlets and disconnect all cables that are connected to the server.
2. If the server is installed in a rack cabinet, remove the server from the rack cabinet and place it on a flat,
clean, and static-protective surface. See the Rack Installation Instructions that comes with the server.
3. Remove the hot-swap redundant power supplies. See "Installing or replacing a hot-swap redundant
power supply" on page 135.
4. Remove the server cover. See "Removing the server cover" on page 89.
5. Remove the cooling shroud. See "Removing and reinstalling the cooling shroud" on page 97.
6. Record the component locations, cable connections, and cable routing in the server.
7. Remove the system fan cage with the installed system fans as a whole by lifting the system fan cage
straight up and out of the chassis.
Figure 162. Removing the system fan cage with system fans
8. Remove the two riser card assemblies. See "Replacing the riser card assembly 1" on page 183 and
"Replacing the riser card assembly 2" on page 185.
P S
U
M e
m
C P
U
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
.
Chapter 6 Installing, removing, or replacing hardware
199